Re: OpenEEG: Analog Modular EEG interface with Arduino

Hi Scott,

Briefly: That analog board is not a complete eeg amp. It is designed to used
with the EEG-DIGITAL-ASM board.

The digital board contains part of the lowpass filter, and the very
important electrical isolation, and a processor with suitable resolution for
the job.

The Arduino does not have suitable resolution, being 8bit.

This has been discussed at length before and you may do well to check the
mailing list archives re Arduino.

Hope this helps.

Paddy 

 

From: Scott Varnhagen [mailto:[email protected]] 
Sent: 04 November 2012 21:45
To: [email protected]
Subject: [Openeeg-list] OpenEEG: Analog Modular EEG interface with Arduino

 

 

Hello OpenEEG community,

 

First of all, thank you for all of your contributions.  I am a mechanical
engineering working with a group of neuroscientists to explore human-machine
interactions via EEG.  Our main interest is interpreting the EEG signals and
applying pattern recognition algorithms to achieve multi-dimensional control
over various systems.  I was overjoyed to find such a wealth of  knowledge
available from openeeg on the hardware side, as that is not our competency.

 

As a mechanical engineer, I would like to deal with the electronics on a
"black box" level. I plan to purchase a single EEG-ANALOG-ASM and 4 x EEG-AE
from Olimex for starters.  If everything is working as desired, I will order
additional units for more channels.  I would like to record the information
provided by the analog circuit with an Arduino system (likely the Mega2560).
This will allow me to record up to 16 EEG channels in the future, as well as
eventually allow me to conduct signal processing and output control voltages
without being connected to a PC.  

 

I have read through the online literature, but still have many questions
(many will likely seem trivial to non-mechanical engineers).  These
questions regard selection of an Arduino system, powering of the
EEG-ANALOG-ASM system, and other component compatibility questions.  If
anybody is interested in helping answer questions of this type, please send
me an e-mail, and we can setup a separate e-mail list to avoid spamming the
entire openeeg list.

 

Thank you for your time!

Scott Varnhagen

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